//sys/class/tty/tty21/subsystem/ttyS0/subsystem/ttyS3/subsystem/tty1/subsystem/tty44/subsystem/tty61/subsystem/tty46/subsystem/tty22/subsystem/tty9/subsystem/tty37/subsystem/tty20/subsystem/tty56/subsystem/tty6/subsystem/tty60/dev